Alert archive / Missouri / Tornado Warnings in 2009

Tornado Warning 16, NWS St. Louis, MO

May 8, 2009Madison County, Missouri

NWS St. Louis, MO issued this tornado warning at May 8, 2009, 12:31 PM CDT for Madison County, Missouri. It was in force for 15 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 8, 2009, 12:31 PM CDT (17:31 UTC)
Expired: May 8, 2009, 12:46 PM CDT
In force: 15 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

County Madison County, MO

The radar

The St Louis radar (KLSX), 132 km from the middle of the area, began a volume at 17:30 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 8, 9:21 AM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 5.5 hours before the alert went out and 305 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1297 J/kg
Mixed-layer CIN: -163 J/kg
Mixed-layer LCL: 606 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 138 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS53 KLSX 081731
TORLSX
MOC123-081800-
/O.NEW.KLSX.TO.W.0016.090508T1731Z-090508T1800Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1231 PM CDT FRI MAY 8 2009

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN MADISON COUNTY IN SOUTHEAST MISSOURI...

* UNTIL 100 PM CDT

* AT 1228 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO
  ON THE NORTH SIDE OF FREDERICKTOWN. DOPPLER RADAR SHOWED THIS
  TORNADO MOVING EAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE..
  MAINLY RURAL AREAS OF NORTHEASTERN MADISON COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS. IF IN MOBILE HOMES
OR VEHICLES...EVACUATE THEM AND GET INSIDE A SUBSTANTIAL SHELTER. IF
NO SHELTER IS AVAILABLE... LIE FLAT IN THE NEAREST DITCH OR OTHER LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

&&

LAT...LON 3753 9031 3764 9031 3764 9016 3748 9014
TIME...MOT...LOC 1731Z 270DEG 21KT 3758 9026

$$

BRITT

1 follow-up statement

000 
WWUS53 KLSX 081746
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1246 PM CDT FRI MAY 8 2009

MOC123-081756-
/O.CAN.KLSX.TO.W.0016.000000T0000Z-090508T1800Z/
MADISON MO-
1246 PM CDT FRI MAY 8 2009

...THE TORNADO WARNING FOR NORTHEASTERN MADISON COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 4 PM CDT.

LAT...LON 3753 9031 3764 9031 3764 9016 3748 9014
TIME...MOT...LOC 1746Z 270DEG 21KT 3758 9015

$$

BRITT

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 7, 10:04 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Moniteau	56 min
May 7, 10:26 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	47 min
May 7, 10:52 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Moniteau, Osage	53 min
May 7, 11:20 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Osage	55 min
May 7, 11:36 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	54 min
May 7, 11:38 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade	57 min
May 8, 12:07 AM CDT	Severe Thunderstorm Warning	LSX	Cole, Moniteau	38 min
May 8, 12:15 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Gasconade, Washington	30 min
May 8, 12:32 AM CDT	Tornado Warning	LSX	Crawford, Washington	28 min
May 8, 12:58 AM CDT	Tornado Warning	LSX	Crawford, Iron, Saint Francois, Washington	37 min
May 8, 1:29 AM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison, Sainte Genevieve, Saint Francois	46 min
May 8, 7:51 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Osage	39 min
May 8, 8:06 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin	39 min
May 8, 8:38 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Washington	37 min
May 8, 9:01 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Iron, Washington	44 min
May 8, 9:12 AM CDT	Flash Flood Warning	LSX	Osage	5 hr
May 8, 9:37 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Francois, Washington	38 min
May 8, 9:53 AM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	52 min
May 8, 10:01 AM CDT	Flash Flood Warning	LSX	Crawford, Gasconade	6 hr
May 8, 10:02 AM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois	43 min
May 8, 10:32 AM CDT	Severe Thunderstorm Warning	LSX	Madison, Saint Francois, Washington	43 min
May 8, 10:47 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Iron, Reynolds	58 min
May 8, 11:01 AM CDT	Flash Flood Warning	LSX	Iron, Jefferson, Sainte Genevieve, Saint Francois, Washington	6 hr
May 8, 11:12 AM CDT	Severe Thunderstorm Warning	LSX	Washington	33 min
May 8, 11:31 AM CDT	Tornado Warning	LSX	Iron, Madison, Saint Francois, Washington	29 min
May 8, 11:45 AM CDT	Tornado Warning	LSX	Sainte Genevieve, Saint Francois	45 min
May 8, 12:05 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Saint Francois	40 min
May 8, 12:18 PM CDT	River Flood Warning	LSX	Osage	20 hr
May 8, 12:18 PM CDT	River Flood Warning	LSX	Cole	28 hr
May 8, 12:27 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	50 min
May 8, 3:51 PM CDT	Areal Flood Warning	LSX	Crawford, Gasconade	12 hr

Nearby

Tornado Warnings in Missouri, 2009 Every tornado warning in 2009 Tornadoes in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.